Resources Contact Us Home
Device for detecting failure in piezoelectric apparatus

Image Number 10 for United States Patent #5376854.

A drive circuit for driving a piezoelectric element includes a transformer having a primary winding connected to a power source and a secondary winding connected to the piezoelectric element, a primary semiconductor element circuit connected to the primary winding for switching the current through the primary winding, and a secondary semiconductor element circuit connected to the secondary winding for switching the current through the secondary winding. A failure detection unit responsive to the potential at a predetermined point of the drive circuit is provided for detecting a failure in the piezoelectric apparatus and outputting a failure detection signal.

  Recently Added Patents
Fail-safe upgrading of portable electronic device software
Semiconductor device and manufacturing method
Varying latency timers in a wireless communication system
Method of fabricating a solar cell with a tunnel dielectric layer
Methods and systems for time-shifting content
Distortion estimation for quantized data
Compositions substantially free of sodium chloride and methods for the storage of red blood cells
  Randomly Featured Patents
Method and device for balancing a tool coupling
Idle system blocking means
Display screen with user interface
Dental alloy for use in the adhesion of porcelain
Automotive internal combustion engine control system
Air blast for cleaning axial separator
Portable phone
Key sensor alarm for door locks
Method and apparatus for making and filling a bag